About this Software Engineer – Security & Infrastructure 🇦🇷 role at The Mobile-First Company
About The Mobile-First Company
Most tools for small businesses weren’t built for real operators.
They were built for employees in offices, not people running a business from their phone.
We’re changing that.
We build mobile-first business software that feels like a consumer app, runs on AI, and spreads like a creator brand.
Our first product, Allo, gives you a second number on your phone, answers missed calls with AI, transcribes everything, and syncs it to your CRM.
Over 20,000 businesses use it every day.
Next up: expenses, invoicing, and more.
We’ve raised +15 million dolars from Base10, Lightspeed, EMBLEM, and 30+ top operators.
Our team is based in Paris, Buenos Aires, Miami.
What will you do:
• Work side by side with our CTO to own our security and compliance roadmap, from strategy to execution.
• Lead our offensive security track with external partners: scope pentests, triage findings and drive the fixes across infrastructure and code.
• Partner with our Infra & Platform team to design, harden and scale the backend and cloud infrastructure behind our products.
What you’ll be working on
• Securing our cloud infrastructure (e.g., AWS, Supabase, Cloudflare): IAM, networking, encryption, secrets and logging.
• Authentication, authorization and data protection across our apps.
• Building security into our CI/CD: code, dependency and secret scanning that keeps pace with a team that deploys every day.
• Writing the code, automations and tooling that fix vulnerabilities and keep them from coming back.
• Owning our compliance controls (HIPAA, GDPR, SOC 2) and closing the technical gaps.
• Monitoring, alerting and incident response for a real-time telephony and AI product.
What we’re looking for
Backend Engineering:
◦ Proficiency in backend development with expertise in languages like Kotlin, Java, Go, Python or similar.
◦ Track record of building and maintaining scalable and reliable backend systems.
◦ Experience with AI is a strong plus, especially in applying models to real-world product use cases and optimizing performance in production environments.
2. Security:
◦ Hands-on security work in production: you’ve fixed vulnerabilities, implemented authentication and authorization (OAuth, JWT, RBAC), or worked in a security, fraud or platform team.
◦ Strong knowledge of secure coding practices and the OWASP Top 10.
◦ Security work beyond your day job (CTFs, bug bounties, certifications, side projects) is a strong plus.
3. Infrastructure:
◦ Hands-on experience with AWS or a similar cloud, networking and production environments.
◦ Familiarity with Infrastructure as Code, CI/CD and monitoring tools like New Relic or Datadog.
4. How you think
◦ You care about why we build things, not just how.
◦ You ask smart questions, challenge ideas when needed, and help shape what’s next.
◦ You think in terms of user value and business impact.
5. How you work
◦ You communicate clearly, give feedback with no ego, and help others grow.
◦ You move fast, take ownership, and thrive in ambiguity.
◦ You're comfortable working in English — and in a small team with big goals.
What matters to us
You’ve worked in product companies
4+ years of experience designing and building high-performance systems used by millions.
You’re proactive, autonomous, and know how to fill the gaps
You can communicate in English, since that's our official language. Most of the team also speaks Spanish and French.
What we offer
Competitive salary (in USD or local equivalent)
Equity package
10-day team retreats abroad every year
Trips to our Hubs (Pairs/Miami/BA) for onboarding and more
Laptop and work setup of your choice
Coverage for private health insurance (for US or LATAM hires)
A tight, ambitious team building something real: fast
How to apply
Click the Apply button on this page to send your application.
No cover letter needed just tell us who you are and why this role fits you.
We welcome people from all backgrounds.
If you’re part of an underrepresented group in tech, we especially want to hear from you.
